Over the past few decades, luminescent semiconductor quantum dots (QDs) have emerged as promising materials for light emitting/absorbing applications, including but not limited to bioimaging, light emitting diodes, displays and photovoltaics. These applications raise the possibility of broad commercial implementation (LEDs and photovoltaics) and intimate biological association (bioimaging). The cadmium chalcogenides such as CdSe, CdS and CdTe QDs have been at the forefront of QD design and performance. Environmental and human health concerns over the use of highly toxic cadmium have driven the field to find cadmium-free alternative materials that retain their superb functions of cadmium-containing QDs while minimizing their environmental and human health impact. InP and InP/ZnS core/shell QDs have emerged as a potential alternative to cadmium-containing QDs. The presentation will introduce a unique synthesis approach to yield InP/ZnS QDs with high emission quantum yield and narrow emission peaks across a broad range of emission peak wavelengths. The presentation will also describe the impact of QD composition on the optical properties of InP(x)/ZnS alloys/multilayer core/shell QDs and their chemical stability towards oxidation and dissolution in organic solvents and aqueous media.

InP-based alloy quantum dots and their compositional effects on thermal/chemical stability

256th National Meeting (2018)

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